It is between the dura mater and arachnoid mater and fills with fluid during trauma

What are supportive structures formed by dura mater

Falx cerebri

Falx cerebelli

Tentorium

What is the Arachnoid Mater?

It is the spider web filamentous layer

Pia Mater

Thin vascular layer adherent to contours of brain

What is the Meningeal layer?

the deepest layer of the dura mater

What is meningitis?

Inflammation of the meninges

Virus and Bacterial invasion through the nose and throat.

What are signs of meningitis?

high fever, stiff neck, drowsiness and intense headache and may progress to coma

How can you diagnose meningitis?

By examining the cerebral spinal fluid through puncture of the lumbar (spinal tap)

What are the internal chambers within the CNS?

Lateral Ventricle

Third Ventricle

Cerebral aqueduct

Fourth Ventricle

Central Canal

Where is the lateral ventricle?

Found inside both cerebral hemispheres

Where is the third ventricle?

a single vertical space under corpus callosum?

Where is the Cerebral aqueduct?

It runs through the midbrain

Where is the Fourth Ventricle?

It is a small chamber between the pons and cerebellum

Where is the Central Canal?

It runs down through the spinal cord

Where are the Ependymal cells found?

the thin epithelial membrane that lines the ventricles in the brain and spinal cords/

What structure in the ventricles produces CSF?

Choroid Plexus

If Meningitis compresses the brain, how would the ventricles appear in a CT scan?

Ventricles would appear smaller

What is the Cerebrospinal Fluid?

The clear liquid that fills the ventricles and canals & bathes its external surface (subarachnoid space)

Where is the Subarachnoid space?

Between the Arachnoid mater and the Pia Mater

Where can is Cerebrospinal Fluid found?

Subarachnoid space

How much Cerebrospinal Fluid is produced and absorbed each day?

500 ml

What does the Choriod plexus filter in Cerebrospinal Fluid?

Blood

What chemical compounds does CSF have more of than plasma?

NA+ and Cl-

WHar chemical compounds does CSF have less of than plasma?

K+ and Ca+2

What are the functions of Cerebrospinal Fluid?

Buoyancy

Protection

Chemical Stability

What is the function of Buoyancy in CSF?

Floats brains so it is neutrally buoyant

What is the function of Protection in CSF?

Cushions from hitting inside of skull

What is the function of Chemical Stability in CSF?

rinses away wastes

What escapes from the 4th ventricle to surround the brain?

CSF

What absorbs CSF into Venous Sinus?

Arachnoid Villi

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